| Overview |
A realtime messaging infrastructure platform providing pub/sub, presence, and stream processing for applications at scale. |
Free email spam score checking tool that analyzes your emails for spam triggers and deliverability issues. |
| Pricing |
Freemium (Free-$99/month) |
Free (Free) |
| Key Features |
- Pub/sub messaging
- Presence
- Stream processing
- Webhooks
- MQTT support
- Message queuing
- History
- Global edge network
|
- Spam score testing
- SPF check
- DKIM check
- DMARC check
- Blacklist check
- Content analysis
|
| Pros |
- Enterprise-grade reliability
- Global edge network
- Protocol support
- Good documentation
|
- Free to use
- Simple interface
- Quick results
- Educational
|
| Cons |
- Can be expensive
- Complex pricing
- Smaller community
- Learning curve
|
- Limited tests per day
- Basic analysis
- No ongoing monitoring
|
